OBDII no power to port - Off-Road Forums & Discussion Groups
Go Back   Off-Road Forums & Discussion Groups > General Off-Road > Electrical & Wiring Tech



Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 06-03-2014, 09:07 PM
bowtie4by's Avatar
Newbie
 
Join Date: Jun 2009
Location: TALLAHASSEE FLORIDA
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
bowtie4by is on a distinguished road
Default OBDII no power to port

There is no display on my OBDII when it is connected to the port, and emissions had the same issue. I failed due to that. I checked fuses and all are good visually. Any ideas why there is no power to the OBDII port in the vehicle? How fix it?
__________________
Been on off-road.com since 2001.
G65 shocks are evil!
Boycotting Castrol for calling their Type III Syntec oil "Synthetic"; Boycotting Mobil1 for changing most of their bases to Type III and refusing to admit. Royal Purple identifies PAO/Type IV as their base; Red Line IDs Group V/ester as base. G80=Gov-Lock=>Locker,auto (not Limited-Slip)
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 06-17-2014, 03:51 PM
bowtie4by's Avatar
Newbie
 
Join Date: Jun 2009
Location: TALLAHASSEE FLORIDA
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
bowtie4by is on a distinguished road
Default No power to OBDII port

What about running a jumper from the cigar lighter to the power wire of the port? It looks as if the wiring diagram shows they are on the same circuit.
__________________
Been on off-road.com since 2001.
G65 shocks are evil!
Boycotting Castrol for calling their Type III Syntec oil "Synthetic"; Boycotting Mobil1 for changing most of their bases to Type III and refusing to admit. Royal Purple identifies PAO/Type IV as their base; Red Line IDs Group V/ester as base. G80=Gov-Lock=>Locker,auto (not Limited-Slip)
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #3  
Old 06-26-2014, 02:35 PM
DezertScorpion's Avatar
Mud in my Veins
 
Join Date: Mar 2005
Location: San Diego, CA
Posts: 6,228
Thanks: 0
Thanked 0 Times in 0 Posts
DezertScorpion is an unknown quantity at this point
Default

Hello bowtie4by,

On your GM truck, the cigarette lighter fuse also powers your OBDII port. Check the fuse box for CIGAR fuse. If it's blown, swap it with the proper auto fuse. Even if it looks good, test it with an ohm meter, or simply exchange it with a good one. Sometimes this fuse gets overloaded with gizmos attached to the cigarette lighter and will blow. Your OBDII port should be good again once you resume power.

Test at home with your own OBDII scanner before taking it into the smog shop again.

Good luck!
__________________
DezertScorpion
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #4  
Old 08-24-2014, 06:46 PM
bowtie4by's Avatar
Newbie
 
Join Date: Jun 2009
Location: TALLAHASSEE FLORIDA
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
bowtie4by is on a distinguished road
Default

Thanks DezertScorpion! I ran a jumper from a 10amp accessory to the back of the OBDII port and it works. When I brought the Tahoe to emissions, the bastages failed me due to a wire powering the port. I'll replace all the suspect fuses with new ones next. Thanks for the help.
__________________
Been on off-road.com since 2001.
G65 shocks are evil!
Boycotting Castrol for calling their Type III Syntec oil "Synthetic"; Boycotting Mobil1 for changing most of their bases to Type III and refusing to admit. Royal Purple identifies PAO/Type IV as their base; Red Line IDs Group V/ester as base. G80=Gov-Lock=>Locker,auto (not Limited-Slip)
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -5. The time now is 02:10 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.2.0
Copyright 1994-2009, VerticalScope Inc. // Off Road forums & discussion groups sitemap
side by side | atv | dirtbike | snowmobile | sandsport | competition | land use | Jeep | Toyota | Ford | GM